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## Homework Statement

Show for a solid spherical ball of mass m rotating about an axis through its center with a charge q uniformly distributed on the surface of the ball that the magnetic moment μ is related to the angular momentum L by the relation

**μ**=(5q/6mc)

**L**

## Homework Equations

μ=IA/c

I sphere =(2/5)m[itex]r^{2}[/itex]

## The Attempt at a Solution

So I have been at this problem for a few days and haven't gotten very far. I know I need to do a volume integral to account for the total charge of the sphere. But I just got the normal volume of a sphere and that didn't get me the relation. I also think I need to integrate dI with respect to dq and da. But I am not really sure on how to go about that. I am sorry for the lame attempt. I really am just lost. Any help would be really appreciated! Thank you!

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